Miter-box.



Patented Sept. 12, 1911.

3 SHEETS-SHEET 1.

1 WITNESSES Q R INVENTOR -Q flu LTAMES GWQRTHAM U. Z1 0 By ATTURNE Y8COLUMBIA PLANMRAPH 60., WASHINGTON, D. c.

J. G. WORTHAM.

MITER BOX. APPLICATION FILED NOV. 30, 1910.

1,003,310. Patented Sept. 12,1911.

1 3 SHEETS-SHEET 2.

WITNESSES INVENTOR Q 115111155 EWJR'IHAM a 2 a I BY ATTORNE Y8 J. G.WORTHAM.

MITER BOX.

APPLIGATIQN TILED NOV. 30, 1910.

Patented Sept. 12, 1911.

3 SHEETS-SHEET 3.

Ira 5mm? LTAMEs GwJR'III-IAM m m a w ATTORNE V8 JAMES GARFIELD WORTHAM,OF TULLAHOMA, TENNESSEE.

MITER-BOX.

Specification of Letters Patent.

Patented Sept. 12, 1911.

Application filed November 30, 1916. Serial No. 594,876.

To all whom it may concern:

Be it known that 1, JAMES G. WORTHAM, a citizen of the United States,residing at Tullahoma, in the county of Coffee and State of Tennessee,have made certain new and useful Improvements in Miter-Boxes, of whichthe following is a specification.

My invention is an improvement in miter boxes, and consists in certainnovel constructions, and combination ofparts, hereinafter described andclaimed.

The object of the invention is to provide a miter box, consisting of abed, which may be widened or narrowed to conform with the dimensions ofthe work, a swinging arm supporting and carrying the saw guide, andcapable of being lengthened and shortened, to correspond with thepositions of the bed sections, and an adjustable back, together with ascale for indicating the angles assumed by the arm.

Referring to the drawings forming a part thereof Figure 1 is a plan viewof the improved box, Fig. 2 is a section on the line 2-'2 of Fig. 1,Fig. 3 is an end view, Fig. 4 is a bottom plan View of the swinging armand the connections, Fig. 5 is a partial top plan view of the arm, Fig.6 1s a front view of one form of saw guide, Fig. 7 is a partiallongitudinal section of the other form of guide, and Fig. 8 is aperspective view of a portion of the same.

The embodiment of the invention shown in the drawings, consists'of a.base bar 1, having at each end a cross head 2, provided with a foot 3.The base bar is also provided at its center with a cross head 4, and therear end of the said cross head is provided with a vertical bearing 5.Each of the cross heads 2 is provided in its rear end with a transversebearing, all of the bearings being in alinement, and a bar 6 is providedwith rounded portions journaled in the bearings. The bar 6 is providedin its upper face with guideways 7, one at each end and in alinement,and the adjacent ends of the guidcways are spaced apart as at 8. A plate9 is slidable in each of the guideways, the two plates forming the rearwall of the box, and the saw 10 is received between their adjacent ends,the space between the plates having at approximately its center thecross head 4. The bar is revoluble in the bearings, and is retained inits adjusted position by means of a slotted link 11, pivoted by one endto a depending integral arm 12 on the bar, the slot registering with anopening in an arm 14 extending rearwardly from the adjacent cross head,and a bolt 15, is passed through the slot and the opening and is engagedby a wing nut 16. The base bar is provided at its ends withforwardlyextending rods 17, upon which are slidable sleeves 18, havingat their outer ends feet 18 and connected with the ends of longitudinalbars 19, the bars and sleeves forming a frame, which is one section ofthe other wall of the box, the other sect-ion consisting of the base barand cross heads, and the sections are movable toward and from eachother, the whole constituting an expansible and contractible wall, orbed for the box. Each of the rods is rigidly connected with the frontend of the adjacent cross head, and the sleeves are retained in adjustedposition by set screws 21, which traverse the sleeves and engage therods. A bracket 22 is pivoted in the vertical bearing of the rearextension from the central cross head, by means of a bolt 23, and a rod24: extends forwardly from the bracket. An arm 25 is provided with asleeve slidable on the rod and the free end of the arm is provided witha handle 25*. A screw 26 passes through the outer section of the arm,and extends upwardly between two of the longitudinal bars, and a block27 is journaled on the screw and arranged slidably between the bars, theupper face of the block having superimposed thereon a pointer 15 for apurpose to be presently described, and a saw guide to be also presentlydescribed, is engaged by the free end of the screw. A cam lever 48 ispivoted to the outer end of a bar 48 whose innerend is pivoted to thesupport 27, and thecam portion of the lever is adapted to engage thefront face of a longitudinal bar 19 to lock the arm' 25 in its adjustedposition. A. saw guide is pivoted to the outer section of the arm, onthe vertical axis 27, the guide shown in Fig. 2 comprising a base 28,and upright backs, and the said bar engages the stops'to limit the depthof the saw cut.

For use with flexible saws, the construc tion shown in Fig. 6 is madeuse of. The said guide comprises a base 84: which may be pivoted to theswinging arm in the same manner as the base 28, and parallel spacedlongitudinally slotted standards extend upwardly from the base. A roller36 is journaled ona sleeve 37, arranged between the standards, and abolt 38 passes through openings in the standards and the sleeve, and isprovided on its threaded end with a nut 38. By tightening the nut thestandards are clamped between the ends of the sleeve and the nut andbolt head respectively, but the sleeve is of greater length than theroller, so that the said roller is free to rotate, regardless of theclamping action on the sleeve. A pair of arms 40 are secured adjustablyon the inner faces of the standards by screws 41, and the saw is securedtherebetween, they forming a guide for the saw. By adjusting the rollerin the longitudinal slots, the depth of the saw cut may be varied. A bar42 square in cross section, and provided with rounded ends 43, has itssaid ends journaled in bearings 43 in the outer ends of the sleeves, andupon each face of the bar is a degree scale 44, and the pointer 45,before mentioned, cooperates with the scale. The scale indicates theangle of the arm or saw, to a transverse line perpendicular to thescale, and a plurality of scales is provided for the different positionsassumed by the outer section of the bed with respect to the inner. Thebar is rotatable in the bearings, thus permitting any of the scales tobe brought into cooperative relation with the pointer.

Itwill be evident from the description,

- thatthe bed of the box, composed by the sections of the wall may-bewidened or narrowed to conform with the dimensions of the work, and thatthe rear wall of the box, or back, may be adjusted from theperpendicular to any required angle with re spect to the bed, byloosening the wing nut and rocking the bar 6. The swinging arm whichcarries the saw guide also lengthens and shortensfto cor: respond withthe width of the bed, and a scale is provided for a plurality ofpositions assumed by the sections of the bed with respect ,to eachother. The sections of the rear wall of the box are adjustable towardand from each other and are retained in adjusted positions by set screws"60. The swinging arm consists of two sections, a fixed section pivotedto the fixed section of the bed, and "a movable section movable with themovable section of the bed. A plate5O gitudinal slot 53, which isengaged by a set screw 52, threaded into the cross head 2. \Vhen theback of the box is tilted, the set screws are loosened, so that theplate may follow the movement of the back.

The arms 30 before mentioned, are each provided with a lug 5et, throughwhich passes a bolt 55 for securing the arms together, and each arm isprovided on its inner face with a transverse recess 56 in which isreceived the reinforcing bar. 33 of the saw. A spring hook 57 isconnected with the upper end of one of the standards, and is adapted toengage the arms to retain the saw in inoperative position.

I claim I 1'. A miter box comprising a bed composed of fixed and movablesections, the fixed section being provided with transversely projectingrods, and the movable section with sleeves sliding on the rods, meansfor fixing the sections with respect to each other, a bar journaled inthe bed at the rear thereof and provided on its upper face withlongitudinal alined guideways, means for retaining the bar in adjustedposition, plates slidable in the guideways, means for fixing the plates,an arm comprising a fixed section pivoted to the fixed section of thebed at the center thereof, and a movable section having a handle andmovable on the fixed section, a saw guide carried by the arm, themovable section of the bed being provided with a longitudinal guidewayin which the guide is movable, means for fixing the arm with respect tothe movable section, a bar square in cross section journaled on themovable section of the bed and providedon each face with a scale, and apointer on the arm c0- operating with the scales.

2. A miter box comprising a bed composed of fixed and movable sections,the fixed section being provided with transversely projecting rods, andthe movable section with sleeves sliding on the rods, means for fixingthe sections with respect to each other, a bar journaled on the bed atthe rear thereof and provided on its upper face with longitudinal alinedguideways, means for retaining the bar in adjusted position, platesslidable in the guideways, means for fixing the plates, an armcomprising a fixed section pivoted to the fixed section of the bed, anda movable section slidable on the fixed section, a saw guide carried bythe arm, and a guideway on the movable section of the bed in which theguide is movable.

3. A miter box comprising a bed composed of fixed and movable sections,the fixed section being provided with transversely projecting rods, andthe movable section with sleeves sliding on the rods, means for fixingthe sections with respect to each other, a bar journaled on the bed atthe rear thereof and providedon its upper face with longitudinal 'i i.tat

alined guideways, means for retaining the bar in adjusted position,plates slidable in the guideways, means for fixing the plates, an armcomprising a plurality of sections movable longitudinally of each otherpivoted to the fixed section of the bed, and a saw guide carried by thearm.

4. A miter box comprising a bed composed of fixed and movable sections,the fixed section being provided with transversely pro jecting rods, andthe movable section with sleeves sliding on the rods, means for fixingthe sections with respect to each other, a bar j ournaled on the bed atthe rear thereof and provided on its upper face with longitudinal alinedguideways, means for retaining the bar in adjusted position, platesslidable in the guideways, means for fixing the plates, a swinging armpivoted to the fixed section of the bed and provided with a movablesection moving with the movable section of the bed, and a saw guide onthe arm.

5. A miter box comprising a bed composed of fixed and movable sections,the fixed section being provided with transversely proj ecting rods, andthe movable section with sleeves sliding on the rods, means for fixingthe sections with respect to each other, a bar j ournaled on the bed atthe rear thereof and provided on its upper face with longitudinal alinedguideways, means for retaining the bar in adjusted position, platesslidable in the guideways, means for fixing the plates, a swinging armpivoted to the fixed section of the bed, and a saw guide carried by thearm.

JAMES GARFIELD VVORTHAM.

Witnesses:

F. K. WILLIAMS, Jr., J. F. BOYD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. O.

